72166335 ÷ 287 
Our goal is to divide 72166335 by 287.

On to step 1:
287 can be fit into 7 0 times, resulting in a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 287

Moving on to step 2:
If we divide 72 by 287, we get 0 and a remainder of 72.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 72 to get 72.
Include the next digit (1) from the dividend after 72, then repeat: 721 / 287

Moving on to step 3:
721 divided by 287 is 2 with a remainder of 147.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 574 away from 721, we end up with 147.
Fetch the next digit (6) from the dividend, attach it to 147 and continue: 1476 / 287

Going ahead to step 4:
When dividing 1476 by 287, we get 5 with a remainder of 41.
The next digit of our result is 5. 
Result so far: 25.0
If we take 1435 away from 1476, we end up with 41.
Bring next digit (6) of the dividend behind the 41 and repeat the process: 416 / 287

On to step 5:
When dividing 416 by 287, we get 1 with a remainder of 129.
Use 1 as the next digit of our solution. 
Result so far: 251.0
Subtract 287 from 416 to get 129.
Fetch the next digit (3) from the dividend, attach it to 129 and continue: 1293 / 287

Advancing to step 6:
The number 287 fits into 1293 4 times, leaving a remainder of 145.
The next digit of our result is 4. 
Result so far: 2514.0
The remainder is 145 after subtracting 1148 from 1293.
Take the next digit (3) from the dividend and append it to 145, then repeat: 1453 / 287

On to step 7:
When dividing 1453 by 287, we get 5 with a remainder of 18.
Put 5 as the next digit of the answer. 
Result so far: 25145.0
If we take 1435 away from 1453, we end up with 18.
Take the next digit (5) from the dividend and append it to 18, then repeat: 185 / 287

Let's proceed to step 8:
When dividing 185 by 287, we get 0 with a remainder of 185.
Write down 0 as next digit of the result. 
Result so far: 251450.0
The remainder is 185 after subtracting 0 from 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Going ahead to step 9:
287 can be fit into 1850 6 times, resulting in a remainder of 128.
Use 6 as the next digit of our solution. 
Result so far: 251450.6
Deduct 1722 from 1850 and we're left with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Step 10:
287 goes into 1280 4 times with a remainder of 132.
Write down 4 as next digit of the result. 
Result so far: 251450.64
If we subtract 1148 from 1280, we get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

On to step 11:
287 goes into 1320 4 times with a remainder of 172.
Use 4 as the next digit of our solution. 
Result so far: 251450.644
Deduct 1148 from 1320 and we're left with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

The final outcome is 251450.644, with a leftover of 0.0172.